Childhood is usually understood as a set of experiences and behaviors, developed in the early stages of human existence, considered as preparation for the adult world. However, childhood history is a very complex topic and has become a very influential area of ​​study in recent years. In 1962, Philippe Ariés's 'Centuries of Childhood' introduced the idea that childhood was a new creation that had developed in recent centuries and as a concept was believed to have non-existent before the 17th century. This concept means that there was no awareness of the process of childhood. In several studies of the medieval period, Ariés noted that childhood was not recognized or even attempted to be represented during this period. For example, in 10th century art, artists were unable to depict a child, except as a man on a smaller scale. It is difficult to determine how long childhood lasts or even what it means; the common core of many studies on childhood is the attempt to understand its nature, to define the core of being a child and to relate it to the experience of life. The main concern of this essay is to understand the meaning of childhood and childhood innocence in the Romantic period, and in turn, to analyze and see how William Blake perceived it in his poetry. During the 18th century the idea of ​​childhood entered Romantic ideology. Before the eighteenth century, society expected a child to follow adult behavior, in which emotional displays of any kind were severely punished and no childish emotions such as outbursts of joy, excitement, or anger were tolerated. When a child no longer needed his mother he entered directly into the world of adults and behaved accordingly, this is how the child......middle of paper......the conception of childhood is changed over time and that The conception of how a child should act or be has over the decades transformed into an ideology of child-centeredness. He believes that once the established childhood began to emerge, his ideals and environment began to change in society as well. However, Bob Corbett (1985) states that if childhood was a creation of society and children acted as they are expected to do, the new concept of childhood would change the way children behave and make them act as society currently he wants them to act. During the Romantic period a new concept of childhood arose, this was the key factor that determined this modern approach which emphasized the innocence and individuality of children, giving relevance to how children of both sexes should be educated and to how parents should approach and treat their children.